flutter架 构项目基础
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崔宝新
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/// ============================================================
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/// 【class 模块模型】班级模块实体 —— 对标 Vue3 api/class/type.ts + api/userPoint/type.ts
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///
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/// 内容（合并自原 features/class/models/）：
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/// 班级动态：UserPostCommonDto / UserPostDto / UserPostResponse / ClassUser
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/// 积分排行：UserRank / UserRankPagedList / UserCountResult
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///
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/// 序列化：手动 fromJson（响应壳 {code,message,data:{...}} 先解包 data，再逐字段取），
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/// 不依赖 build_runner。数字用 _toInt 兜底字符串数字。
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///
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/// 说明：UserPostDto 提供 copyWith（点赞/评论乐观更新需要在列表内替换单条）。
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/// ============================================================
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library;
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// ============ 班级动态 ============
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class UserPostCommonDto {
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const UserPostCommonDto({
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this.userId = 0,
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this.userName = '',
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this.content = '',
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this.createTime = '',
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this.id = 0,
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});
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final int userId;
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final String userName;
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final String content;
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final String createTime;
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final int id;
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factory UserPostCommonDto.fromJson(Map<String, dynamic> json) =>
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UserPostCommonDto(
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userId: _toInt(json['userId']),
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userName: json['userName'] as String? ?? '',
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content: json['content'] as String? ?? '',
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createTime: json['createTime'] as String? ?? '',
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id: _toInt(json['id']),
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);
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}
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class UserPostDto {
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const UserPostDto({
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this.userId = 0,
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this.userName = '',
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this.avatar = '',
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this.classId = 0,
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this.content = '',
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this.likeCount = 0,
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this.replyCount = 0,
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this.subjectName = '',
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this.createTime = '',
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this.userLikeStatus = false,
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this.commons = const [],
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this.id = 0,
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this.urls = const [],
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this.type = 0, // 1 攻克任务 2 试题笔记 3 讲义笔记
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this.userLikeAvatars = const [],
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});
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final int userId;
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final String userName;
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final String avatar;
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final int classId;
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final String content;
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final int likeCount;
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final int replyCount;
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final String subjectName;
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final String createTime;
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final bool userLikeStatus;
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final List<UserPostCommonDto> commons;
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final int id;
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final List<String> urls;
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final int type;
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final List<String> userLikeAvatars;
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factory UserPostDto.fromJson(Map<String, dynamic> json) => UserPostDto(
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userId: _toInt(json['userId']),
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userName: json['userName'] as String? ?? '',
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avatar: json['avatar'] as String? ?? '',
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classId: _toInt(json['classId']),
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content: json['content'] as String? ?? '',
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likeCount: _toInt(json['likeCount']),
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replyCount: _toInt(json['replyCount']),
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subjectName: json['subjectName'] as String? ?? '',
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createTime: json['createTime'] as String? ?? '',
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userLikeStatus: json['userLikeStatus'] as bool? ?? false,
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commons: (json['commons'] as List<dynamic>? ?? const [])
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.whereType<Map<String, dynamic>>()
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.map(UserPostCommonDto.fromJson)
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.toList(),
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id: _toInt(json['id']),
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urls: (json['urls'] as List<dynamic>? ?? const [])
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.whereType<String>()
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.toList(),
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type: _toInt(json['type']),
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userLikeAvatars: (json['userLikeAvatars'] as List<dynamic>? ?? const [])
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.whereType<String>()
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.toList(),
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);
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UserPostDto copyWith({
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int? userId,
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String? userName,
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String? avatar,
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int? classId,
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String? content,
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int? likeCount,
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int? replyCount,
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String? subjectName,
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String? createTime,
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bool? userLikeStatus,
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List<UserPostCommonDto>? commons,
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int? id,
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List<String>? urls,
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int? type,
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List<String>? userLikeAvatars,
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}) {
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return UserPostDto(
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userId: userId ?? this.userId,
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userName: userName ?? this.userName,
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avatar: avatar ?? this.avatar,
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classId: classId ?? this.classId,
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content: content ?? this.content,
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likeCount: likeCount ?? this.likeCount,
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replyCount: replyCount ?? this.replyCount,
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subjectName: subjectName ?? this.subjectName,
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createTime: createTime ?? this.createTime,
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userLikeStatus: userLikeStatus ?? this.userLikeStatus,
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commons: commons ?? this.commons,
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id: id ?? this.id,
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urls: urls ?? this.urls,
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type: type ?? this.type,
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userLikeAvatars: userLikeAvatars ?? this.userLikeAvatars,
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);
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}
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}
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/// 班级动态分页响应
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///
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/// 响应壳：{code, message, data: {data: UserPostDto[], total, ...}}
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/// 外层 data 是分页对象，内层 data 是动态数组。
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class UserPostResponse {
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const UserPostResponse({
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this.data = const [],
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this.total = 0,
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this.pageIndex = 1,
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this.pageSize = 10,
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this.id = 0,
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});
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final List<UserPostDto> data;
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final int total;
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final int pageIndex;
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final int pageSize;
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final int id;
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factory UserPostResponse.fromJson(Map<String, dynamic> json) {
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final payload = json['data'] is Map<String, dynamic>
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? json['data'] as Map<String, dynamic>
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: json;
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final list = payload['data'];
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return UserPostResponse(
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data: list is List
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? list
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.whereType<Map<String, dynamic>>()
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.map(UserPostDto.fromJson)
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.toList()
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: const [],
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total: _toInt(payload['total']),
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pageIndex: _toInt(payload['pageIndex']),
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pageSize: _toInt(payload['pageSize']),
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id: _toInt(payload['id']),
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);
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}
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}
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class ClassUser {
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const ClassUser({
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this.userId = 0,
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this.userName = '',
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this.avatar = '',
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this.isOnline = false,
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});
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final int userId;
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final String userName;
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final String avatar;
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final bool isOnline;
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factory ClassUser.fromJson(Map<String, dynamic> json) => ClassUser(
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userId: _toInt(json['userId']),
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userName: json['userName'] as String? ?? '',
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avatar: json['avatar'] as String? ?? '',
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isOnline: json['isOnline'] as bool? ?? false,
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);
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}
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// ============ 积分排行 ============
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class UserRank {
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const UserRank({
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this.userName = '',
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this.userId = 0,
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this.userAvatar = '',
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this.userClassName = '',
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this.rank = 0,
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this.points = 0,
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});
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final String userName;
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final int userId;
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final String userAvatar;
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final String userClassName;
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final int rank;
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final double points;
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factory UserRank.fromJson(Map<String, dynamic> json) => UserRank(
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userName: json['userName'] as String? ?? '',
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userId: _toInt(json['userId']),
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userAvatar: json['userAvatar'] as String? ?? '',
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userClassName: json['userClassName'] as String? ?? '',
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rank: _toInt(json['rank']),
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points: _toDouble(json['points']),
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);
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}
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class UserRankPagedList {
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const UserRankPagedList({
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this.myRank,
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this.userRanks = const [],
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this.total = 0,
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this.pageIndex = 1,
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this.pageSize = 20,
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});
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final UserRank? myRank;
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final List<UserRank> userRanks;
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final int total;
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final int pageIndex;
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final int pageSize;
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factory UserRankPagedList.fromJson(Map<String, dynamic> json) {
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final payload = json['data'] is Map<String, dynamic>
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? json['data'] as Map<String, dynamic>
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: json;
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// 兼容 userRanks / data 两种返回字段
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final ranksList = payload['userRanks'] is List
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? payload['userRanks'] as List<dynamic>
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: (payload['data'] is List
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? payload['data'] as List<dynamic>
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: const []);
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return UserRankPagedList(
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myRank: payload['myRank'] is Map<String, dynamic>
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? UserRank.fromJson(payload['myRank'] as Map<String, dynamic>)
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: null,
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userRanks: ranksList.whereType<Map<String, dynamic>>().map(UserRank.fromJson).toList(),
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total: _toInt(payload['total']),
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pageIndex: _toInt(payload['pageIndex']),
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pageSize: _toInt(payload['pageSize']),
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);
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}
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}
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class UserCountResult {
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const UserCountResult({
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this.classUserCount,
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this.gradeUserCount,
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this.cloudSchoolUserCount,
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});
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final int? classUserCount;
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final int? gradeUserCount;
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final int? cloudSchoolUserCount;
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factory UserCountResult.fromJson(Map<String, dynamic> json) {
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final payload = json['data'] is Map<String, dynamic>
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? json['data'] as Map<String, dynamic>
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: json;
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return UserCountResult(
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classUserCount: _toIntOrNull(payload['classUserCount']),
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gradeUserCount: _toIntOrNull(payload['gradeUserCount']),
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cloudSchoolUserCount: _toIntOrNull(payload['cloudSchoolUserCount']),
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);
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}
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}
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// ============ 类型转换工具 ============
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int _toInt(dynamic v) {
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if (v is num) return v.toInt();
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if (v is String) return int.tryParse(v) ?? 0;
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return 0;
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}
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double _toDouble(dynamic v) {
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if (v is num) return v.toDouble();
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if (v is String) return double.tryParse(v) ?? 0;
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return 0;
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}
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int? _toIntOrNull(dynamic v) {
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if (v == null) return null;
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if (v is num) return v.toInt();
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if (v is String) return int.tryParse(v);
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return null;
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}
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